21057016

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{281}}^1$

素因数の和:352

約数の個数: 64

約数和(自身を含む): 45684000

約数和(自身を除く): 24626984

約数列:

[1, 2, 4, 8, 17, 19, 29, 34, 38, 58, 68, 76, 116, 136, 152, 232, 281, 323, 493, 551, 562, 646, 986, 1102, 1124, 1292, 1972, 2204, 2248, 2584, 3944, 4408, 4777, 5339, 8149, 9367, 9554, 10678, 16298, 18734, 19108, 21356, 32596, 37468, 38216, 42712, 65192, 74936, 90763, 138533, 154831, 181526, 277066, 309662, 363052, 554132, 619324, 726104, 1108264, 1238648, 2632127, 5264254, 10528508, 21057016]

約数ペア:

[(1, 21057016), (2, 10528508), (4, 5264254), (8, 2632127), (17, 1238648), (19, 1108264), (29, 726104), (34, 619324), (38, 554132), (58, 363052), (68, 309662), (76, 277066), (116, 181526), (136, 154831), (152, 138533), (232, 90763), (281, 74936), (323, 65192), (493, 42712), (551, 38216), (562, 37468), (646, 32596), (986, 21356), (1102, 19108), (1124, 18734), (1292, 16298), (1972, 10678), (2204, 9554), (2248, 9367), (2584, 8149), (3944, 5339), (4408, 4777)]